My service manual is incorrect, according to the tech tips, regarding the left/right orentation of the sub valves. When I checked the bike by looking in the exhaust port, the valves were open instead of closed as they are supposed to be. However, upon removing the head, I could not extract the sub valves. I believe the shafts that rotate the sub valves have to be removed first, which would require cylinder removal. I did find that I could lift the subvalves part way out, rotate them, and re-insert them so they are closed when viewed through the exhaust port. Rotating the centrifugal actuating shaft causes the valves to open, which is what they are supposed to do. So, have I solved the problem without swapping the subvalves? And isn't this an easier solution?
